feat: 使用发送多个地址包来改善大数据读取的速度

server/src/UdpClientPool.cs

@@ -110,6 +110,46 @@ public class UDPClientPool
         return await Task.Run(() => { return SendAddrPack(endPoint, pkg); });
     }
 
+    /// <summary>
+    /// 发送多个地址包
+    /// </summary>
+    /// <param name="endPoint">IP端点（IP地址与端口）</param>
+    /// <param name="pkgs">地址包集合(最多512 / 8)</param>
+    /// <returns>是否全部成功</returns>
+    public static bool SendMultiAddrPack(IPEndPoint endPoint, IEnumerable<WebProtocol.SendAddrPackage> pkgs)
+    {
+        const int maxPkgs = 512 / 8;
+        var pkgList = pkgs.Take(maxPkgs).ToList();
+        if (pkgList.Count == 0) return false;
+
+        // 合并所有包为一个buffer
+        int totalLen = pkgList.Sum(pkg => pkg.ToBytes().Length);
+        byte[] buffer = new byte[totalLen];
+        int offset = 0;
+        foreach (var pkg in pkgList)
+        {
+            var bytes = pkg.ToBytes();
+            Buffer.BlockCopy(bytes, 0, buffer, offset, bytes.Length);
+            offset += bytes.Length;
+        }
+
+        Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+        var sendLen = socket.SendTo(buffer.ToArray(), endPoint);
+        socket.Close();
+
+        return sendLen == buffer.Length;
+    }
+
+    /// <summary>
+    /// 异步发送多个地址包
+    /// </summary>
+    /// <param name="endPoint">IP端点（IP地址与端口）</param>
+    /// <param name="pkgs">地址包集合(最多512 / 8)</param>
+    /// <returns>是否全部成功</returns>
+    public async static ValueTask<bool> SendMultiAddrPackAsync(IPEndPoint endPoint, IEnumerable<WebProtocol.SendAddrPackage> pkgs)
+    {
+        return await Task.Run(() => SendMultiAddrPack(endPoint, pkgs));
+    }
 
     /// <summary>
     /// 发送数据包
@@ -392,14 +432,14 @@ public class UDPClientPool
     public static async ValueTask<Result<byte[]>> ReadAddr4BytesAsync(
         IPEndPoint endPoint, int taskID, UInt32 devAddr, int dataLength, int timeout = 1000)
     {
-        var optsList = new List<SendAddrPackOptions>();
+        var pkgList = new List<SendAddrPackage>();
         var resultData = new List<byte>();
 
         // Check Msg Bus
         if (!MsgBus.IsRunning)
             return new(new Exception("Message bus not working!"));
 
-        // Prepare options for each segment
+        // Prepare packages for each segment
         var max4BytesPerRead = 0x80; // 512 bytes per read
         var rest4Bytes = dataLength % max4BytesPerRead;
         var readTimes = (rest4Bytes != 0) ?
@@ -419,15 +459,15 @@ public class UDPClientPool
                 BurstLength = (byte)(currentSegmentSize - 1),
                 Address = devAddr + (uint)(i * max4BytesPerRead)
             };
-            optsList.Add(opts);
+            pkgList.Add(new SendAddrPackage(opts));
         }
 
-        // Send all address packages first, but keep outstanding < 512
+        // Send address packages in batches of 128, control outstanding
         int sentCount = 0;
         var startTime = DateTime.Now;
-        while (sentCount < optsList.Count)
+        const int batchSize = 128;
+        while (sentCount < pkgList.Count)
         {
-            // Check how many data packets have been received
             var elapsed = DateTime.Now - startTime;
             if (elapsed >= TimeSpan.FromMilliseconds(timeout))
                 break;
@@ -436,14 +476,16 @@ public class UDPClientPool
             var found = await MsgBus.UDPServer.GetDataCountAsync(endPoint.Address.ToString(), taskID, timeleft);
             int outstanding = sentCount - (found.HasValue ? found.Value : 0);
 
-            // If outstanding >= 512, wait for some data to be received
-            if (outstanding >= 512)
+            // If outstanding >= 512 - batchSize, wait for some data to be received
+            if (outstanding >= 512 - batchSize)
                 continue;
 
-            // Send next address package
-            var ret = await UDPClientPool.SendAddrPackAsync(endPoint, new SendAddrPackage(optsList[sentCount]));
-            if (!ret) return new(new Exception($"Send address package failed at segment {sentCount}!"));
-            sentCount++;
+            // Send next batch of address packages (up to 128)
+            int batchSend = Math.Min(batchSize, pkgList.Count - sentCount);
+            var batchPkgs = pkgList.Skip(sentCount).Take(batchSend);
+            var ret = await UDPClientPool.SendMultiAddrPackAsync(endPoint, batchPkgs);
+            if (!ret) return new(new Exception($"Send address package batch failed at segment {sentCount}!"));
+            sentCount += batchSend;
         }
 
         // Wait until enough data is received or timeout
@@ -474,7 +516,7 @@ public class UDPClientPool
         for (var i = 0; i < udpDatas.Count; i++)
         {
             var bytes = udpDatas[i].Data;
-            var expectedLen = ((optsList[i].BurstLength + 1) * 4);
+            var expectedLen = ((pkgList[i].Options.BurstLength + 1) * 4);
             if (bytes.Length != expectedLen)
                 return new(new Exception($"Expected {expectedLen} bytes but received {bytes.Length} bytes at segment {i}"));
             resultData.AddRange(bytes);